let obj={
    a:1,
    b:2,
    c:3,
}
let proxy = new Proxy(obj,{
    get:function(target,key){
        console.log(111);
        
        return target[key]
    },
    set:function(target,key,value){
        console.log(111);
        
        target[key] = value
    }
})
obj.a =3
console.log(obj.a);

